Dredge.



w. s; & B. F. CURTIS.

' DEEDGE.

' APYLIOATION FILED JUNE 29', 1912 I Patented Mar. 18, 1913.

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INVENTORS MZZz'am A. Hara d? dizrdwma LurZr/Lv ATTORNEYS- W S, 6: E. P.CURTIS.

.DEEDGB.

APPUOA'Z'ION FILED mm: 29, 1912.

Patented Mar. 18,1913.

2 SHEETS-SHEET 2.1

mum NR WI T/VESSES:

UNITED STATES PATENT OFFICE.

WILLIAM S. CURTIS AND ED'WARLD IF. CURTIS, OF PORTLAND, OREON.

cannon.

'pecification of Letters l atcnt.

ljatcnted Mar. 1%., it EH3.

provision of certain improvements in pipe. dredges of a simple buthighly efiicient charactor for gathering the earth, mud,--gravel orsand, etc... mingled with water, at the bottom of a river or harbor, andforcing the same, under a hydraulic pressure through a giant nozzle anddischarging the gathered material at a desired distancefrom the orig--inal excavattfn without the use of pipe lines,

barges, troughs, etc, such as are commonly used for conveying thedischarged c llections from the gathering point.

Another object of our invention is the pro vision of certainimprovements in dredges, whereby to produce the hydraulic giant. effectof discharging the material collected by. thedredging apparatus per so,in such a manner as to effect a, great saving in time and labor, byeliminating the handling and anchoring of pontoons, such as are commonlyused for supporting a pipe line discharge as well as the refitting ofpipe joints in the said line;

.A further object or our invention is the provision of an improvedconstruction of dredging ap aratus having a special design,

and cotipera tire arrangement ofparts whereby the same is capable ofWorking advantageously in rough water as well as in smooth water.

Referring now to the drawings,-h lgure 1, is a-plan view that shows thegeneral construction andarrangement of the parts that constitute ourimproved dredge. Fig. 2, is a diagrammatic side elevation thereof. Fig.3, is a detail top plan view '(parts being broken away) of the means forsupporting.

and raising and lowering the suction pipe "and cutter devices. Fig. 4,is a detail cross section on the nne 4t-4 on Fig. 8.

Fig. 5,

is a detail view of the ejecting nozzle coupling. Fig. 6, is a detail.perspective view of the cutter.

In-the practical appucatlon or our invention, the same, in its completemake-up, in-

cludes a suitable vessel in the nature of. a

hull with a divided stern. V

'l designates a rotary cutter for cotiperah ing with the suction pipe 5that leads to a single centrifugal pump 6, suitably mounted upon thehull deck and coupled with and driven by the engine or motor 15 which isindirect connection with the said pump 5. the latter furnishing thesuction power for gathering the dredged material loosened b t the rotarycutter carrying shaft 2'? to whic power istransmitted, through the gear30 on a shaft 3 mounted on the dredging end of the. hull, see Figs. 1and 2, and which meshes with the gear 538 on the shaft 2?. Suction pipe5 includes a. main. or'suction portion that terminates in a yoke 50includ ing laterals 51. 51 rockably mounted in the adjacent.- sides ofthe divided end of the huli and a main or otltahe portion 52 that joinswith a fiuid tightcoupling or union 53 mounted on. one of the pipelaterals 51, as is clearly shown in Fig. 4, by reference to which itwill be also noticed that the othe. lateral 51., which forms one of thejournals for the frame, is closed a cap 54. The offtake portion 51 ofthe pipe 5 conveys the dredgings to the pump 6 and from the said pump,they are drawn cit into a pipe line 7 that connects with the four-waycoupling 70, the, laterals '71 of which are normally closed by capplates 72.

One of the outlets 72 of the coupling 70. detachahlyjoins with a shortpipe line 73 that delivers the dredging from the single stageccntrijfugal pump 6 to a. multistage centrifugal turbine orturbo-centrifugal pump 8 of the commercially known t'y e, which createsa high hydraulic pressure or discharging the collected mud, earth, sand,

gravel, or other solidsyiningled with water through the discharge pipe.9 that. extends forwardly and upwardly and connects with 10 designates agiant nozzle and tlie same has an adjustable ball and'soc'ket connection-facilitate adjusting the said 12 with the pipe section 90, see Fig. '5,to giant nozzle in the directions desired.

a 13 and 14 designate boilers for operating .the engines for the singleand the multistage pumps 6 and 8 respectively and 16 desigua'tes anengine for operating the cutter shaft, the transmission gearing and thegearing for actuating the devices tor raising and lowering the cutterand suction pipe i'ntake portion frame 2, the bottom of which carriescollar mountings 20 fixedly conhull for anchoring and changing theposition of the hull, it being understood the said cables engage andwind on the winches 17.

I ?.designates a winch that takes up a hoisting cable 21 that passes upover a pulley block 22 pendent from the upper end of a supportor crane24 fixedly mounted on and projected over the divided end of the hull.Cable 21. passes down over a pulley block 25 ona hanger 26 that includesa chain sling 29 for passing around the front end of the suction pipeFrom block 25, the cable 21 passes backover the pulley 22 and connectswith the hanger 26, as shown.

.1 While"'w'e have not illustrated it, in prac tice countershaft 18.isequipped with friction and clutch devices of any wellknown type forselecting and throwinginto and out.

of action the'desired ones winches o-r drums.

of the winding From the foregoing taken in connection with the drawingsthe construction, the mannerrof operation and the advantages of ourinvention will be readily apparent.

By reason of arranging the dred ing and dlscharging means as shownandescribed, the said means can be readily installed on a'self-propelled sea'going hull, and on able 'of working continuouslyWhile the sai seagoing hull is in motion and since the'use of pontoonsand pipe lines thereto are eliminated our improved dredging means ispracticable in water rougher'.than that in which 'pipe lines supportedby pontoons could work. p

".What we claim is:

,1 In a dredge,'a hull, a frame thereon pro ected over one end thereof,a digger and a suction pipe section mounted thereon, a dischargingnozzle mounted on the other end ot the hull, a primary pumping meansconn cted with the suction pipe, and a second-' ary pumping means incommunication with the first pumping means and the nozzle.

2. Ina dredge, a hull, a frame thereon projected over one end thereof, adigger and a suction pipe section mounted thereon, a discharging nozzlemounted on the other end of the hull, a rimary pumping means connectedwith t e suction pipe, a secondary pumping means in communication withthe first pumping means and the nozzle, the said primary pumping meanscomprising a single stage centrifugal pump and the secondary pumpingmeans consisting of a multistage centrifugal pump.

WILLIAM S. CURTIS. EDWARD F. CURTISQ Vitnesses as to signature ofVilliam S. Curtis:

IRENE Anms'rnono, WM, E. BECKE'I'I. Witnesses as to signature of EdwardT7 Curtis E. E. McVnAon, Gn0. U PEQHT.

